Marlen Caemmerer wrote:
Rosemary (one of the enwiki-DB-Hosts) seems to bring
the maximum of the I/O that is possible, disk graphs are clipping there.
In the MySQL traffic graph you can see there is clipping too.
Strange thing about this is that this phenomenon started in the middle of september. Can
anyone remember any important change in this time?
That is not the case with thyme (other enwiki DB Host) so it'd be a question wether
we could share the load better.
Also I enabled query caching and will see if this is useful in any way.
Maybe there's some job/tool which started at that time which loaded
rosemary so much?